I have a '78 GMC Sierra that originally had a 350 diesel engine in it. Sometime in the past it was replaced with an Oldsmobile 350 gas engine. Seems like a good engine, but I can't get the rocker arm bolt to stay tight on the #3 exhaust valve. I've even tried locktite but it just backed back off after about a days worth of driving.
Anyone have a solution to this problem? Will a new bolt make a difference? The fix on Chevy engines is easy... just go buy a new locknut, but the Olds engines use a bolt.
This is just an old work truck so I'm not going to spend a fortune on fixing it. I only paid $400 for it to begin with.
Thanks, Tony